diff --git a/source/includes/mongodb-compatibility-table-scala.rst b/source/includes/mongodb-compatibility-table-scala.rst
index 06843c2..f3ef682 100644
--- a/source/includes/mongodb-compatibility-table-scala.rst
+++ b/source/includes/mongodb-compatibility-table-scala.rst
@@ -14,6 +14,17 @@
      - MongoDB 4.0
      - MongoDB 3.6
 
+   * - 5.5
+     - ✓
+     - ✓
+     - ✓
+     - ✓
+     - ✓
+     - ✓
+     - ✓
+     -
+     - 
+
    * - 5.2 to 5.4
      - ✓
      - ✓
diff --git a/source/upgrade.txt b/source/upgrade.txt
index f6e51d5..d9e8b68 100644
--- a/source/upgrade.txt
+++ b/source/upgrade.txt
@@ -56,6 +56,15 @@ changes between the current and upgrade versions. For example, if you
 are upgrading the driver from v4.0 to v4.7, address all breaking changes from
 the version after v4.0 including any listed for v4.7.
 
+.. _scala-breaking-changes-v5.5:
+
+Version 5.5 Breaking Changes
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- The driver is no longer compatible with {+mdb-server+} version
+  4.0. To learn more about this change, see the
+  :ref:`scala-server-release-change-v5.5` section.
+
 .. _scala-breaking-changes-v5.2:
 
 Version 5.2 Breaking Changes
@@ -476,6 +485,16 @@ end-of-life (EOL).
 To learn more about the MongoDB support for EOL products,
 see the `Legacy Support Policy <https://www.mongodb.com/support-policy/legacy>`__.
 
+.. _scala-server-release-change-v5.5:
+
+Driver Version 5.5 Server Support Changes
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The v5.5 driver drops support for {+mdb-server+} 4.0.
+To use the v5.5 driver, you must connect to {+mdb-server+} 4.2 or later. To
+learn how to upgrade your {+mdb-server+} deployment, see
+:manual:`Release Notes </release-notes>` in the {+mdb-server+} manual.
+
 .. _scala-server-8.1-incompatibility:
 
 Server Version 8.1 Support Changes
@@ -491,17 +510,17 @@ incompatibility with the v3.x driver.
 Driver Version 5.2 Server Support Changes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The v5.2 driver drops support for {+mdb-server+} v3.6. To use the
-v5.2 driver, your {+mdb-server+} must be v4.0 or later. To learn
-how to upgrade your {+mdb-server+} deployment, see :manual:`Release
-Notes </release-notes>` in the {+mdb-server+} manual.
+The v5.2 driver drops support for {+mdb-server+} 3.6.
+To use the v5.2 driver, you must connect to {+mdb-server+} 4.0 or later. To
+learn how to upgrade your {+mdb-server+} deployment, see
+:manual:`Release Notes </release-notes>` in the {+mdb-server+} manual.
 
 .. _scala-server-release-change-v4.8:
 
 Driver Version 4.8 Server Support Changes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The v4.8 driver drops support for {+mdb-server+} v3.4 and earlier.
-To use the v4.8 driver, your {+mdb-server+} must be v3.6 or later. To learn
+The v4.8 driver drops support for {+mdb-server+} 3.4 and earlier.
+To use the v4.8 driver, you must connect to {+mdb-server+} 3.6 or later. To learn
 how to upgrade your {+mdb-server+} deployment, see :manual:`Release
 Notes </release-notes>` in the {+mdb-server+} manual.
diff --git a/source/whats-new.txt b/source/whats-new.txt
index 8615fb2..20c7689 100644
--- a/source/whats-new.txt
+++ b/source/whats-new.txt
@@ -21,6 +21,7 @@ What's New
 Learn about new features, improvements, and fixes introduced in the
 following versions of the {+driver-long+}:
 
+* :ref:`Version 5.5 <scala-version-5.5>`
 * :ref:`Version 5.4 <scala-version-5.4>`
 * :ref:`Version 5.3 <scala-version-5.3>`
 * :ref:`Version 5.2 <scala-version-5.2>`
@@ -28,6 +29,17 @@ following versions of the {+driver-long+}:
 * :ref:`Version 5.1.1 <scala-version-5.1.1>`
 * :ref:`Version 5.1 <scala-version-5.1>`
 
+.. _scala-version-5.5:
+
+What's New in 5.5
+-----------------
+
+.. important:: Removal of Support for {+mdb-server+} 4.0
+
+   {+driver-short+} v5.5 removes support for {+mdb-server+} 4.0. To
+   learn more about compatible versions of the server, see
+   :ref:`scala-compatibility`.
+
 .. _scala-version-5.4:
 
 What's New in 5.4